tinyriscv/rtl/if_id.v

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/*
Copyright 2019 Blue Liang, liangkangnan@163.com
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
`include "defines.v"
// inst fetch module
module if_id (
input wire clk,
input wire rst,
input wire[`SramBus] inst_i, // inst content
input wire[`SramAddrBus] inst_addr_i, // inst addr
input wire jump_flag_ex_i,
output reg[`SramBus] inst_o,
output reg[`SramAddrBus] inst_addr_o
);
always @ (posedge clk) begin
if (rst == `RstEnable) begin
inst_o <= `ZeroWord;
inst_addr_o <= `ZeroWord;
end else if (jump_flag_ex_i == `JumpEnable) begin
inst_o <= `INST_NOP;
inst_addr_o <= `ZeroWord;
end else begin
inst_o <= inst_i;
inst_addr_o <= inst_addr_i;
end
end
endmodule